<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片式图区域 -->
    <el-card>
      <!-- 头部的警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数"
                type="warning"
                show-icon
                :closable="false">
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader expand-trigger="hover"
                       v-model="selectedCateKeys"
                       clearable
                       change-on-select
                       :options="cateList"
                       :props="cateProps"
                       @change="parentCateChange"></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName"
               @tab-click="handleTabClick">
        <!-- 添加动态参数面板 -->
        <el-tab-pane label="动态参数"
                     name="many">
          <!-- 添加参数按钮 -->
          <el-button type="primary"
                     size="mini"
                     :disabled='isBtnDisabled'
                     @click="adddialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData"
                    border
                    strip>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag :closable="true"
                        v-for="(item,i) in scope.row.attr_vals"
                        :key="i"
                        @close='handleClose(i,scope.row)'>{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input class="input-new-tag"
                          v-if="scope.row.inputVisible"
                          v-model="scope.row.inputValue"
                          ref="saveTagInput"
                          size="small"
                          @keyup.enter.native="handleInputConfirm(scope.row)"
                          @blur="handleInputConfirm(scope.row)">
                </el-input>
                <!-- 添加按钮 -->
                <el-button v-else
                           class="button-new-tag"
                           size="small"
                           @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"
                             label="#"></el-table-column>
            <el-table-column label="参数名称"
                             prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button icon="el-icon-edit"
                           size="mini"
                           type="primary"
                           @click="showEditDialog">编辑</el-button>
                <el-button icon="el-icon-delete"
                           size="mini"
                           type="danger"
                           @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性面板 -->
        <el-tab-pane label="静态属性"
                     name="only">
          <!-- 添加属性按钮 -->
          <el-button type="primary"
                     size="mini"
                     :disabled='isBtnDisabled'
                     @click="adddialogVisible = true">添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData"
                    border
                    strip>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag :closable="true"
                        v-for="(item,i) in scope.row.attr_vals"
                        :key="i"
                        @close='handleClose(i,scope.row)'>{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input class="input-new-tag"
                          v-if="scope.row.inputVisible"
                          v-model="scope.row.inputValue"
                          ref="saveTagInput"
                          size="small"
                          @keyup.enter.native="handleInputConfirm(scope.row)"
                          @blur="handleInputConfirm(scope.row)">
                </el-input>
                <!-- 添加按钮 -->
                <el-button v-else
                           class="button-new-tag"
                           size="small"
                           @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"
                             label="#"></el-table-column>
            <el-table-column label="属性名称"
                             prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button icon="el-icon-edit"
                           size="mini"
                           type="primary"
                           @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button icon="el-icon-delete"
                           size="mini"
                           type="danger">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数对话框 -->
    <el-dialog :title="'添加'+titleText"
               :visible.sync="adddialogVisible"
               width="50%"
               @close='addDialogClose'>
      <!-- 添加参数对话框 -->
      <el-form :model="addForm"
               :rules="addFormrules"
               ref="addFormRef"
               label-width="100px">
        <el-form-item :label="titleText"
                      prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="adddialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改对话框 -->
    <el-dialog :title="'修改'+titleText"
               :visible.sync="editDialogVisible"
               width="50%"
               @close='editDialogClose'>
      <!-- 添加参数对话框 -->
      <el-form :model="editForm"
               :rules="editFormrules"
               ref="editFormRef"
               label-width="100px">
        <el-form-item :label="titleText"
                      prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      cateList: [{
        cat_id: 1,
        cat_name: '大家电',
        children: [
          {
            cat_id: 11,
            cat_name: '电视',
            children: [{
              cat_id: 111,
              cat_name: '彩电'
            }, {
              cat_id: 112,
              cat_name: '小彩电'
            }]
          }
        ]
      }, {
        cat_id: 2,
        cat_name: '测试1',
        children: [
          {
            cat_id: 21,
            cat_name: '黄金珠宝'
          },
          {
            cat_id: 22,
            cat_name: '首饰配饰'
          },
          {
            cat_id: 23,
            cat_name: '品牌墙'
          }
        ]
      }],
      // 级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定到的数组
      selectedCateKeys: [],
      // 被激活的页签名称
      activeName: 'many',
      manyTableData: [{
        attr_name: '动态',
        attr_id: 1,
        attr_vals: ['你好', 'nihao', 'hello', 'nice'],
        inputVisible: false,
        inputValue: ''
      }],
      onlyTableData: [{
        attr_name: '静态',
        attr_id: 1,
        attr_vals: ['你好', 'nihao', 'hello', 'nice']
      }],
      // 控制添加对话框的显示与隐藏
      adddialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormrules: {
        attr_name: { required: true, message: '请输入活动名称', trigger: 'blur' }
      },
      editDialogVisible: false,
      editForm: {
        attr_name: '123'
      },
      editFormrules: {
        attr_name: { required: true, message: '请输入活动名称', trigger: 'blur' }
      },
      // 控制按钮与文本框的显示隐藏
      inputVisible: false,
      // 文本框中输入的内容
      inputValue: ''
    }
  },
  created () {
    // this.getCateList()
  },
  methods: {
    // 获取所有商品分类
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      this.cateList = res.data
    },
    // 级联选择框选中项发生改变
    parentCateChange () {
      this.getParamsData()
    },
    // tab页签点击事件的处理函数
    handleTabClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData () {
      // 证明选择的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        // this.manyTableData = []
        // this.onlyTableData = []
      }
      // 证明选择的是三级分类
      console.log(this.selectedCateKeys)
      // 根据所选分类id和当前所处面板获取对应的参数
      // const { data: res } = await this.$http.get(`categories/${cateId}/attributes`, { params: { sel: this.activeName } })
      // if (res.meta.status !== 200) {
      //   return this.$message.error('获取数据失败')
      // }
      // res.data.forEach(item => {
      //   item.attr_vals =item.attr_vals ? item.attr_vals.split(' ') :[]
      // 控制文本框的显示与隐藏
      // item.inputVisible = false
      // 文本框中输入的值
      // item.inputValue = ''
      // })
      // if (this.activeName === 'many') {
      //   this.manyTableData = res.data
      // } else {
      //   this.onlyTableData = res.data
      // }
    },
    // 监听添加对话框的关闭事件
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加参数
    addParams () {
      this.$refs.addFormRef.validate(valid => {
        if (!valid) return
        // const { data: res } = this.$http.post(`categories/${this.cateId}/attributes`, {
        //   attr_name: this.addForm.attr_name,
        //   attr_sel: this.activeName
        // })
        // if (res.meta.status !== 201) {
        //   return this.$message.error('获取数据失败')
        // }
        this.$message.success('添加参数成功')
        this.adddialogVisible = false
        this.getParamsData()
      })
    },
    async showEditDialog (id) {
      this.editDialogVisible = true
      // const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, { params: { attr_sel: this.activeName } })
      // if (res.meta.status !== 200) {
      //   return this.$message.error('获取数据失败')
      // }
      // this.editForm = res.data
    },
    editDialogClose () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮修改参数
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
        //   attr_name: this.editForm.attr_name,
        //   attr_sel: this.activeName
        // })
        // if (res.meta.staus !== 200) {
        //   this.$message.error('获取数据失败')
        // }
        this.editDialogVisible = false
      })
    },
    // 根据id删除对应的参数项
    async removeParams (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
      // if (res.meta.staus !== 200) {
      //   this.$message.error('删除参数失败')
      // }
      this.$message.success('删除成功')
    },
    // 文本框失去焦点或按下enter触发
    async handleInputConfirm (row) {
      console.log('ok')
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
      }
      // 如果没有return,则证明输入了内容，需要做进一步处理
      this.manyTableData.attr_vals.push(row.inputValue.trim())
      row.inputVisible = false
      row.inputValue = ''
      // 需要发起请求，保存数据
      this.saveAttrVals(row)
    },
    showInput (row) {
      row.inputVisible = true
      // $nextTick当页面上元素被重新渲染之后才会执行回调函数中的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除对应的参数可选性
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    },
    // 将对attr_vals的操作封装函数
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')

      })
      if (res.meta.staus !== 200) {
        this.$message.error('修改参数失败')
      }
      this.$message.success('修改参数成功')
    }
  },
  computed: {
    // 如果按钮需要禁用返回true
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 动态计算对话框标题
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }

  }
}
</script>
<style scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>
